22 min read

The Programming Process

Understand the problem, define inputs, outputs and boundaries, plan, write, test and improve — the steps every programmer follows.

Six Steps

The programming (software development) process
The programming (software development) process

Worked example

Step 5 — a test plan

Test Type Input Expected output 1 Normal 3000 3000.00 2 Normal 8000 7200.00 3 Boundary 5000 5000.00 (no discount) 4 Boundary 5000.01 4500.01 (rounded to 2 dp) 5 Erroneous -50 Error message 6 Erroneous abc Error message

Practice

Which order is correct?

Six Steps

The programming (software development) process
The programming (software development) process

Worked Example: the Shop Discount

Worked example

Step 5 — a test plan

Test Type Input Expected output 1 Normal 3000 3000.00 2 Normal 8000 7200.00 3 Boundary 5000 5000.00 (no discount) 4 Boundary 5000.01 4500.01 (rounded to 2 dp) 5 Erroneous -50 Error message 6 Erroneous abc Error message

Practice

Which order is correct?

Test	Type	Input	Expected output
1	Normal	3000	3000.00
2	Normal	8000	7200.00
3	Boundary	5000	5000.00 (no discount)
4	Boundary	5000.01	4500.01 (rounded to 2 dp)
5	Erroneous	-50	Error message
6	Erroneous	abc	Error message